{{define  "/user/hello.html"}}
    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
    {{.c | add}}  1
    <br>
    {{urlpath "cs"}}  2
    <br>
    {{urlpath "pc"}}   3
    <br>
    {{urlpath "pc" "cs" "fr"}}  4
    </body>
    </html>

{{end}}